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Production method for adsorbent coupling chitosan and bamboo charcoal by dialdehyde

A technology for coupling chitosan with dibasic aldehyde and production method, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. , the effect of reducing CODcr

Inactive Publication Date: 2011-01-12
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After retrieval and market investigation, no reports were found on the use of dialdehyde-coupled chitosan and bamboo charcoal as adsorbents in domestic sewage treatment, and there were no reports on the production methods of such adsorbents and related products on the market.

Method used

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  • Production method for adsorbent coupling chitosan and bamboo charcoal by dialdehyde
  • Production method for adsorbent coupling chitosan and bamboo charcoal by dialdehyde
  • Production method for adsorbent coupling chitosan and bamboo charcoal by dialdehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 (comparison of raw materials and parts by weight thereof for embodiment 1 in Table 1):

[0017] Get 5 parts by weight of chitosan and add in 1250 parts by weight of 5% acetic acid solution, fully stir to make chitosan dissolve completely. Then add 50 parts by weight of bamboo charcoal, fully stir for 5-6 hours, and place for 6-8 hours. Take 4 parts of 40% glyoxal and add water to make 800 parts of 0.2% solution, add the glyoxal solution dropwise into the acidic mixed solution of bamboo charcoal and chitosan, stir for 7-8 hours, then slowly add sodium hydroxide solution to pH =10-11, continue to stir for 2-3 hours, terminate the coupling reaction, then carry out solid-liquid separation of the reactant, take the solid, add the solid to 150 parts by weight of water for washing, stir for 1 hour, and separate the solid-liquid again, Then add the solid matter into 125 parts of 95% ethanol, stir for 1 hour, filter, and dry the filter cake under vacuum for 24 hour...

experiment example

[0024] Under the condition of normal temperature, compare the treatment capacity of this adsorbent, bamboo charcoal and activated sludge on domestic sewage. Add 4g each of the adsorbent, bamboo charcoal and activated sludge to treat 150mL of domestic sewage, add the domestic sewage into a 250mL Erlenmeyer flask, then place the Erlenmeyer flask in a shaker at a speed of 130r / min, vibrate continuously for 24 hours, and let it stand 2h, take the supernatant to measure turbidity, pH, COD cr , Ammonia nitrogen index, the specific experimental data are shown in Table 2.

[0025] Table 2 Comparison table of the treatment results of domestic sewage by this adsorbent, bamboo charcoal and activated sludge

[0026]

[0027]

[0028] After continuous shaking for 24h, the turbidity is 21NTU, COD cr Under the conditions of 151.7mg / L and ammonia nitrogen concentration of 56.2mg / L, the COD of domestic sewage by this adsorbent cr The removal rate is 66%, which is better than that of b...

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Abstract

The invention relates to a production method for an adsorbent coupling chitosan and bamboo charcoal by dialdehyde. The method comprises the preparation of chitosan acid solution, the pretreatment of bamboo charcoal, the preparation of acid mixed solution of bamboo charcoal and chitosan, the preparation of a coupled reactant of chitosan and bamboo charcoal, and the preparation of the bamboo charcoal adsorbent coupled with chitosan. The invention relates to the production method for the adsorbent for domestic sewage treatment. Compared with bamboo charcoal and activated sludge applied to the domestic sewage treatment, the adsorbent prepared by the method has better effects of reducing CODcr, turbidity and ammonia nitrogen in the domestic sewage.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a domestic sewage treatment agent. Background technique [0002] Chitosan and coupled chitosan have a good sewage purification ability due to their microscopic porous structure. However, chitosan has the disadvantages of easy loss and large dosage. Bamboo charcoal has developed pores, large specific surface area, strong adsorption capacity, and is relatively cheap, and is more used in sewage treatment. But the adsorption of bamboo charcoal has a saturation. [0003] The invention utilizes the advantages of the two at the same time, and adopts a new method to organically combine the two to obtain a sewage treatment agent with better performance. Taking advantage of the high adsorption capacity of bamboo charcoal, adding a coupling agent to couple chitosan and bamboo charcoal into larger polymers, the acid and water solubility of chitosan after c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 陈斌金首文李文珠
Owner ZHEJIANG FORESTRY UNIVERSITY
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